What name does Don Quixote give to his imagined lady?

Don Quixote gives his imagined lady the name Dulcinea del Toboso.

Before beginning his adventures, Alonso Quijano decides that a knight-errant must have a lady to inspire his deeds. He chooses a peasant woman from the nearby village of El Toboso and transforms her in his imagination into an idealized noblewoman. He names her Dulcinea del Toboso, a title designed to sound suitably elegant and aristocratic.

The woman behind this fantasy is Aldonza Lorenzo, whom the novel describes as a local farmworker. Don Quixote’s Dulcinea, however, is not simply a realistic portrait of Aldonza: she is an imagined model of beauty, virtue, and noble status. Dulcinea never appears directly or speaks in Cervantes’s novel, yet she motivates many of Don Quixote’s actions.

A common mix-up is treating Aldonza Lorenzo as the answer. Aldonza is the woman who inspires the invention; Dulcinea del Toboso is the name Don Quixote gives to his idealized lady.